In this video, AWS security consultant David Hong demonstrates how to query Amazon Security Lake data using Amazon Athena and create visualizations with Amazon QuickSight. He covers the prerequisites for setting up Security Lake, enabling data sources like CloudTrail and VPC Flow Logs, and granting necessary permissions. David walks through example SQL queries in Athena to analyze security data from different AWS services. He also shows how to build a QuickSight dashboard to visualize Security Hub findings by severity. The demo provides a practical guide for leveraging Security Lake's centralized data to improve security analysis and monitoring across AWS environments. Viewers will learn how to set up and query Security Lake data to gain insights into their AWS security posture.